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Ms. Katie Larsen <br />04/10/2024 <br />Page 3 <br />Lino Lake Tech Center Engineering Review <br />(WSB 4/5/2024) Complete. <br /> <br />7. (WSB 4/5/2024) (Redline comment from previous plans) Show EOFs for catch basins <br />north of the building. Provide minimum required freeboard from lowest openings of <br />both existing and proposed buildings. <br /> <br /> <br /> <br />• Stormwater Management <br /> <br />The stormwater management for the Lino Lakes Tech Center consists of the installation of <br />storm sewer structures and pipes to convey the site’s runoff to a new BMP (basin) on the <br />west side of the parcel. The runoff is generated from the one 36,040 square foot storage <br />building and associated driveway and parking that is proposed to be constructed on the site. <br />The development of the site will result in 0.144 acres of reconstructed impervious, and 1.341 <br />acres of new impervious for a total of 1.485 acres of total impervious. <br /> <br /> <br />Comments: <br />1. The applicant shall provide an updated Stormwater Management Report <br />demonstrating the appropriate sizing and treatment for the expansion. <br />(Amcon 11/13/2023) Understood, Civil drawings will be provided for the full Site & <br />Building Plan Submittal after this Concept Submittal approval. <br />(WSB 11/29/2023) To be reviewed at the time of full submittal. <br />(WSB 3/6/2024) Updated report matches plans for new impervious and BMP grading. <br />Further comments are provided below. <br /> <br /> <br />2. (WSB 3/6/2024) Applicant to clarify BMP type. It is referenced as both a biofiltration <br />basin and an infiltration basin at various points. <br />(Elan 3/26/2024) This has been cleaned up in the report. The facility has undergone <br />numerous changes resulting in disparities. The basin is an infiltration basin. <br /> <br />3. (WSB 3/6/2024) Applicant to specify access route to proposed BMP. The current site <br />plan appears to require access through an existing BMP or down a retaining wall. <br />(Elan 3/26/2024) The retaining wall just east of the basin overflow is zero feet high. <br />Small tracked equipment such as a skid steer or excavator can cross the curb here to <br />access the outlet control device. The basin is also accessible in a similar manner at <br />the south end of the proof of parking area. <br /> <br />4. (WSB 3/6/2024) Applicant to revise CN of disturbed pervious cover in accordance <br />with RCWD Rule C.4(b). <br />(Elan 3/26/2024) This change was requested by RCWD and has been made. The <br />change had limited impact on the HWL or peak discharge rates. <br /> <br />116